I don't care how to go from point a to b. I choose the faster way to get there give that I get there.

With film cameras we learned all the basics from a to z. Now we just use the advance features on DSLR and go about our lives. I don't remember when was the last time I used Zone system. With all the DR you hardly need to go thru it. But I agree from fundamental point of view one needs to know them just in case for certain applications.